Some researchers believe the first Native Americans were semi-nomadic groups from Central Asia who followed migrating herds across a land bridge from Siberia into Alaska toward the end of the last Ice Age. Archaeologists call this group the “Clovis-culture” after the discovery of artifacts near Clovis, New Mexico.
Other researchers believe the first Native Americans were groups from Australia and Europe that had already settled both continents when the Clovis people arrived. Skeletal remains from Chile and Brazil indicate Aboriginal origins, and tools discovered in several locations contain materials present only in France. Along with DNA testing and language characteristics, this evidence supports an increasingly accepted theory that the first Native Americans evolved from several groups over a long period of time rather than from the single migration of one specific race.